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Battery Tender 021-0123 Junior 12V, 0.75A Battery Charger and Maintainer, Black/Green (021-0123)

4.8 4.8 out of 5 stars 45,483 ratings

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Purchase options and add-ons

Brand Battery Tender
Color Black/Green
Product Dimensions 1.3"D x 2.4"W x 3.3"H
Output Voltage 12 Volts
Input Voltage 12 Volts

About this item

  • STAY CHARGED: Battery Tender battery chargers and maintainers provide a full charge to your powersport vehicle’s battery before switching to float mode to maintain proper voltage levels for safe, long-term storage
  • EXTEND BATTERY LIFE: Compatible with all 12V lead-acid, flooded, AGM, and gel cell batteries. Complete 4-step charging program (Initialization, Bulk Charge, Absorption Mode, Float Mode) allows for optimization of battery power, without overcharging or battery damage. Smarter than a trickle charger.
  • INCLUDES: 12V, 750mA battery charger and battery maintainer with 12-foot output cord, fused-ring terminal harness for hard-to-reach batteries and alligator clip accessory cables, 5-year warranty, and lifetime customer support
  • SIMPLE & SAFE: Low maintenance, easy-to-use, universal battery charger is just 3.3 x 1.3 x 2.4 inches, 1 lb (charger only). Spark-proof circuitry ensures no-spark connections, and automatic reversed hook-up detection verifies correct connection
  • MONITOR POWER LEVELS: Two-color charge status LED light indicates the state of the charge and if the battery voltage drops too far under load, adaptive charging will resume full charger output power. Automatic charge cycle functionality switches to float mode after fully charging the battery
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This product has fewer returns than average compared to similar products.

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$39.95
Get it as soon as Sunday, Mar 31
In Stock
Sold by Deltran USA and ships from Amazon Fulfillment.
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$11.95
Get it as soon as Sunday, Mar 31
In Stock
Sold by Deltran USA and ships from Amazon Fulfillment.
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Battery Tender 021-0123 Junior 12V, 0.75A Battery Charger and Maintainer, Black/Green (021-0123)
Battery Tender 021-0123 Junior 12V, 0.75A Battery Charger and Maintainer, Black/Green (021-0123)
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Price-11% $39.95
List:$44.95
$23.99$54.95$74.99$22.99$24.98
Delivery
Get it as soon as Sunday, Mar 31
Get it as soon as Sunday, Mar 31
Get it as soon as Sunday, Mar 31
Get it as soon as Sunday, Mar 31
Get it as soon as Sunday, Mar 31
Customer Ratings
Cord length
4.8
4.0
4.8
4.2
3.2
Safety Features
4.7
4.4
4.8
4.6
4.0
Weatherproof
3.5
4.6
4.3
Sold By
Deltran USA
YOCAGO
Deltran USA
Taylored Specialties
YOCAGO
eztronics corp
input voltage
12 volts
12 volts
12 volts
12 volts
12 volts
12 volts
battery charge time
1 hours
24 hours
24 hours
weight
10.2 ounces
0.85 kilograms
1 pounds

From the brand


Product Description

Battery Tender Junior NH on Tool Table with alligator clips near by.
Keep charged so it's ready when you are.

Battery Tender Junior 750mAh 12V Battery Charger

INCLUDES: 12V, 750mA battery charger and battery maintainer with 12-foot output cord, fused-ring terminal harness for hard-to-reach batteries and alligator clip accessory cables and lifetime customer support

Battery Tender
Battery Tender Junior 021-123

The Best-Selling Battery Tender Junior 021-0123

Battery Tender

Battery Tender Junior 021-0123

STAY CHARGED: Battery Tender battery chargers and maintainers provide a full charge to your powersport vehicle’s battery before switching to float mode to maintain proper voltage levels for safe, long-term storage

Battery Tender

Battery Tender Junior 021-0123

SIMPLE & SAFE: Low maintenance, easy-to-use, universal battery charger is just 3.3 x 1.3 x 2.4 inches, 1 lb (charger only). Spark-proof circuitry ensures no-spark connections, and automatic reversed hook-up detection verifies correct connection

Battery Tender Junior Model Comparison

Battery Tender Junior 12V Charger and Maintainer: Automatic 12V Powersports Battery Charger

Battery Tender 021-0123

Battery Tender

Battery Tender 022-0199

Battery Tender

Battery Tender 022-0196

Battery Tender

Battery Tender 022-0197

Customer Reviews
4.8 out of 5 stars
45,483
4.8 out of 5 stars
3,909
4.7 out of 5 stars
489
4.5 out of 5 stars
678
Voltage
12V 12V 6V 8V
Amperage
750mAh 800mAh 1.25 AMP 1.25 AMP
Lawnmower
Charges & Maintains Charges & Maintains Charges & Maintains Charges & Maintains
Motorcycle
Charges & Maintains Charges & Maintains Charges & Maintains Charges & Maintains
ATV / UTV
Charges & Maintains Charges & Maintains Charges & Maintains Charges & Maintains
Personal Watercraft
Charges & Maintains Charges & Maintains Charges & Maintains Charges & Maintains
Car
Maintains Maintains Maintains Maintains
Boat
Not Recommended Not Recommended Maintains Maintains

What is a Battery Tender Junior Charger and Maintainer used for?

Battery Tender battery chargers and maintainers provide a full charge to your powersport vehicle’s battery before switching to float mode to maintain proper voltage levels for safe, long-term storage.

What types of batteries is the Battery Tender Junior designed for?

Compatible with all 12V lead-acid, flooded, AGM, and gel cell batteries. Complete 4-step charging program (Initialization, Bulk Charge, Absorption Mode, Float Mode) allows for optimization of battery power, without overcharging or battery damage.

What is included with purchase of the Battery Tender Junior?

12V, 750mA battery charger and battery maintainer with 12-foot output cord, fused-ring terminal harness for hard-to-reach batteries and alligator clip accessory cables and lifetime customer support.

Can you monitor your battery's current voltage with the Battery Tender Junior?

Two-color charge status LED light indicates the state of the charge and when voltage drops too far under load, adaptive charging resumes full charger output power. Automatic charge cycle switches to float mode after fully charging the battery.

Will this Battery Tender Junior charge an automobile's battery?

The Battery Tender Junior is designed primarily to charge smaller vehicles such as motorcycles, scooters and ATVs. While it would work to maintain an automobile's battery, we recommend slightly more power offered by our Battery Tender Plus 021-128.

Product information

Technical Details

Additional Information

Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.
Product Warranty: For warranty information about this product, please Click here [PDF ]

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Battery Tender 021-0123 Junior 12V, 0.75A Battery Charger and Maintainer, Black/Green (021-0123)


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What's in the box

  • Battery Tender 021-0123
  • Product guides and documents

    Looking for specific info?

    Customer reviews

    4.8 out of 5 stars
    4.8 out of 5
    45,483 global ratings

    Customers say

    Customers like the cord length, quality, performance, versatility, and instructions of the auto accessory. For example, they mention it works great, has many convenient features, and the instructions are clear and helpful. Customers are also impresseded with the value, battery life, and size.

    AI-generated from the text of customer reviews

    4,521 customers mention4,204 positive317 negative

    Customers are satisfied with the performance of the battery tender. They mention that it works as expected, it provides a slow charge, and that it tops off super fast. Some customers also have two motorcycles and the first battery tender works well so they got a second one. Overall, most are happy with their purchase and recommend it to others.

    "Using on my boat and lawnmower. Works, great! Wish I would’ve understood how easy these are to use and would’ve started using them 20 years ago!..." Read more

    "...I have it wired up to my side-by-side, and the old one always worked great with no issues, right up to the point where I drove off with it still..." Read more

    "...are taken out a couple times a year for exercise and they start right up with no issues. Inexpensive, dependable, and convenient for purpose." Read more

    "...Simple, seems well-built, and works as expected!" Read more

    2,874 customers mention2,499 positive375 negative

    Customers like the battery life of the auto accessory. They say it keeps the battery charged up, lengthens the life of it, and is reliable. Customers also mention that it works great and hasn't had any battery failures. They also say it's simple and easy to use and does not overcharge batteries.

    "...They quickly connect to any battery and plug-in to the outlet, that is all there is to it! They put out 2 A an hour...." Read more

    "...an older model of this one, and is was still working great, never had any problems...." Read more

    "...device attached to the battery and turned on, to constantly keep the battery in good condition. I should have bought this device years ago." Read more

    "...Found it to be reasonably priced and certainly easy to use. It recharged my battery and keeps it fully charged." Read more

    2,475 customers mention2,361 positive114 negative

    Customers are satisfied with the value of the auto accessory. For example, they mention it's the best on the market, it extends the life of any battery by years, and it'll charge their car battery up quickly. Some say that it'd be a good product for the price.

    "...Inexpensive, dependable, and convenient for purpose." Read more

    "Bought this tender for my generator battery. Found it to be reasonably priced and certainly easy to use...." Read more

    "...PLUS….. I’m a 72 little old lady. Great product." Read more

    "All my toys are one of these bad boys. Cant go wrong. Great value for the price. Definitely buy it from Amazon. Big box stores are more expensive...." Read more

    2,311 customers mention1,768 positive543 negative

    Customers like the quality of the battery charger. For example, they say it's the best battery charger they've ever owned, reliable, and well-built. Some mention that the clips are sturdy and easy to see and read. Overall, most are satisfied with the quality and functionality of the product.

    "...Hopefully I won't drive of with this plugged in. This are great trickle chargers!!" Read more

    "...Simple, seems well-built, and works as expected!" Read more

    "...This has saved me from constantly needing a jump!" Read more

    "It’s not a quick charger. Good price. It works great on keeping the battery charged on my cars I don’t drive that often." Read more

    1,425 customers mention1,400 positive25 negative

    Customers find the instructions for the auto accessory very straightforward, easy to use, and saves time and money. They also say it's easy to install and wire to their vehicle.

    "...Works, great! Wish I would’ve understood how easy these are to use and would’ve started using them 20 years ago!..." Read more

    "...Simple, seems well-built, and works as expected!" Read more

    "I'm very pleased with this product so far. The instructions were clear and helpful. The device seems designed well...." Read more

    "...Found it to be reasonably priced and certainly easy to use. It recharged my battery and keeps it fully charged." Read more

    495 customers mention471 positive24 negative

    Customers like the size of the auto accessory. For example, they mention it's compact, easy to store, and portable. The wire length is decent and it maintains any size 12 volt battery. That said, some are happy with the purchase and recommend it to others.

    "...It worked perfectly. And it's small enough to store it in your storage compartment." Read more

    "This was the perfect length to be able to reach my bike from the wall outlet" Read more

    "Small and compact it works as described. Perfect for maintaining a battery and keeping it always ready to use at full charge...." Read more

    "This is a great tool for charging a battery and doing it quickly. Small, lightweight, but effective as hell! Buy one, you won’t regret it." Read more

    315 customers mention266 positive49 negative

    Customers like the cord length of the auto accessory. They mention it's small and compact with a cord long enough for their needs. Some say that the long cord really helps in the garage and they seem to charge quickly. Overall, most are satisfied with the cord's length.

    "I like the simplicity of the batter tender and the length of the power cord...." Read more

    "Perfect length leads and power cord !!" Read more

    "...The cords are long, and the unit will not over-charge the battery." Read more

    "long cord really helps in the garage and they seem to charge quickly...." Read more

    307 customers mention307 positive0 negative

    Customers find the auto accessory very handy, useful, and versatile. They say it works flawlessly, provides more capability, and is a great addition to any car, bike, or RV. Customers also mention that it's really great for riding lawnmowers.

    "...Inexpensive, dependable, and convenient for purpose." Read more

    "Great product for any car, bike, Rv" Read more

    "What's great. Handy little device. Does what it supposed to do, charge and maintenance the battery...." Read more

    "Very handy" Read more

    Plug it in and forget it!
    5 Stars
    Plug it in and forget it!
    I use this on my pickup. No more low battery! Simple and easy to use. You’ll love it!AAA+++
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    Reviewed in the United States on February 26, 2024
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    Top reviews from other countries

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    Pete Bostelmann
    5.0 out of 5 stars Perfection
    Reviewed in Canada on November 15, 2023
    enrique medina
    5.0 out of 5 stars magnifico producto
    Reviewed in Mexico on October 16, 2023
    Jakson Pereira
    5.0 out of 5 stars Cumpre o que promete.
    Reviewed in Brazil on February 1, 2022
    Brendan Nugent
    1.0 out of 5 stars For use in the US
    Reviewed in the United Kingdom on July 17, 2019
    2 people found this helpful
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    Venceslau
    5.0 out of 5 stars Otimo produto !
    Reviewed in Brazil on July 20, 2022